enacted under the provisions of paragraph two. Owner of a newspaper or other mass media business shall be a Thai national. No grant of money or other properties shall be given by the state as subsidies to private newspapers or other mass media. Section 46: Officials or employees of a private sector undertaking, newspaper or radio or television broadcasting business shall enjoy their liberty to present news and express their opinions under the constitutional restrictions without mandate of any state agency or owner of such business provided that it is not contrary to their professional ethics. Section 26: In exercising powers of all state authorities, regard shall be given to human dignity, rights, and liberties in accordance with the provisions of this Constitution. Section 28: A person can invoke human dignity or exercise his or her rights and liberties in so far as it is not in violation of rights and liberties of other persons or contrary to this Constitution or good morals. Section 29: Restriction of such rights and liberties as recognized by the Constitution shall not be imposed on a person except by virtue of provisions of the law which must not affect the essential substances of such rights and liberties. Print media The first instance of censorship in Thailand occurred with the advent of the first printing press in the country. Thailand's first law book was banned and all copies and the original manuscript were ordered destroyed. Under the 1941 Printing and Advertisement Act, the Royal Thai Police Special Branch has the authority to issue warnings to publications for various violations such as disturbing the peace, interfering with public safety, or offending public morals. According to a study by the Political Science Library at Thammasat University, from 1850 to 1999, 1,057 books and periodicals were officially banned by publication in the Royal Gazette, including many books among the "100 books every Thai should read". Many titles reflect their era of anti-communist fervor but were published both in Thailand and abroad in Thai, Chinese, Vietnamese, Korean, Bahasa, English, German, French, and Spanish. Historically, this and other acts have been used to severely restrict press freedom, especially during the military governments of Plaek Pibulsonggram, Sarit Dhanarajata, and Thanom Kittikachorn (up to 1973). Books on Thai feudalism, the monarchy, and religion viewed by the Thai government as disruptive were banned and their authors imprisoned. A student-led uprising in 1973 led